| 纪星星,阮杰,刘浩,罗祎浩.遵义地区基于风险普查标准钻孔的土动力学参数初步研究[J].贵州地质,2025,42(1):100-109 |
| 遵义地区基于风险普查标准钻孔的土动力学参数初步研究 |
| Preliminary Study of Soil Dynamics Parameters Base on Standard Drilling for Seismic Hazard Risk Survey in Zunyi Area |
| 投稿时间：2024-11-26 |
| DOI： |
| 中文关键词: 遵义地区 地震风险普查 土动力学参数 动剪切模量比 阻尼比 |
| 英文关键词:Zunyi area Earthquake risk survey Soil dynamics parameters Dynamic shear modulus ratio Damping ratio |
| 基金项目:贵州省地震局《地震地质与活断层探测创新团队》(编号:GZSDZJDZKJJJ202103)，《全国自然灾害综合风险普查遵义市地震灾害风险普查试点项目》资助 |
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| 中文摘要: |
| 贵州遵义位于上扬子地块的黔北隆起区，毗邻川中盆缘过渡带，具有典型远震效应敏感地质特征。本研究基于区域地震灾害风险普查标准钻孔数据，系统分析了不同埋深条件下典型土体动力参数的变化特征。研究结果显示:区域内粘性土层以含碎屑粘土和均质粘土为主，其动剪切模量比与埋深呈显著正相关关系，而阻尼比参数在垂直方向上未呈现明显规律性分布。值得注意的是，大应变条件下粘土实测阻尼比普遍低于现行规范建议值，采用规范、推荐参数可能造成场地地震动峰值加速度低估，直接影响工程抗震设计安全储备。通过建立区域性统计模型计算的地震动参数与实测数据吻合度高，表明该统计值可为黔北地区地震危险性区划及重大工程场地地震安全性评价提供科学依据。 |
| 英文摘要: |
| Zunyi of Guizhou province is located in the Qianbei uplift zone of the upper Yangtze block，adjacent to the transition zone of the Sichuan central basin margin It has typical geological characteristics sensitive to far-field seismic effects Based on the standard borehole data of the regional seismic hazard risk census，in this paper，it systematically analyzed the variation characteristics of the dynamic parameters of typical soil under different burial depths The research results show that the clay layers in the region are mainly composed of clay with debris and homogeneous clayThe dynamic shear modulus ratio of these clays has a significant positive correlation with burial depth，while the damping ratio parameter does not show a clear regular distribution in the vertical direction Notably，the measured damping ratio of clay under large strain conditions is generally lower than the recommended values in current standards Using the standard and recommended parameters may lead to an underestimation of the peak ground acceleration of the site，directly affecting the safety reserve of engineering seismic designThe calculated ground motion parameters based on the regional statistical model have a high degree of consistency with the measured data，indicating that this statistical value can provide a scientific basis for seismic hazard zoning in the Qianbei region and seismic safety evaluation of major engineering sites |
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